Difference analysis device, difference analysis method and difference analysis program

摘要

PROBLEM TO BE SOLVED: To set the content of a difference after making them change according to the necessity when performing the extraction of the difference between a plurality of drawings.SOLUTION: A difference analysis device receives a rule for defining equivalence of a logic, receives a first logic drawing and a second logic drawing created by using the logic, converts the first logic drawing into a first directed graph by extracting an element and a signal line from the first logic drawing, converts the second logic drawing into a second directed graph by extracting the element and the signal line from the second logic drawing, corrects the first directed graph or the second directed graph converted based on a received rule, and compares the first directed graph with the second directed graph after the conversion or compares the second directed graph with the first directed graph after the conversion, and thereby extracting a difference between the first logic drawing and the second logic drawing so as to display the extracted difference on the screen.SELECTED DRAWING: Figure 3